Question

What is the value of x in the equation x - y = 30, when y = 15?
4
8
80
200

Answer 1

x = 45

Explanation:

1. Replace y with 15

x - 15 = 30

2. Add 15 to both sides

x - 15 + 15 = 30 + 15

3. Combine like terms

x = 45